Single lever ring mechanism having rectilinear binder rings

Office supplies; artists and teachers materials – Book – album or cover – Element or attachment

Design Patent

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Design Patent

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D0616934

CLAIM:
The ornamental design for a single lever ring mechanism having rectilinear binder rings, as shown and described.

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World Wide Stationery Manufacturing Company Limited, publication date unknown (A).
World Wide Stationery Manufacturing Company Limited, publication date unknown (B).
World Wide Stationery Manufacturing Company Limited, publication date unknown (C).

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